Virgo Logbook

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Environmental Monitoring (Environmental Monitoring)

fiori, tringali, quemener - 18:51 Sunday 21 January 2024 (63039)

magnetic injections NF at WE and SDB1

Today we performed additional NF injections with the small coil.

At WE the small coil was positioned at the 2nd stage of the platform, approximately close to the F7, we performed one sweep 8-330 Hz, 5V, 300s, all three orientations

At SDB1 we performed sweep injections 8-1000 Hz, 5V, 300 in four locations:

tower base, S-W corner
platform level, S-W corner
tower base E-N corner (same location as the injectio performed in May)
tower base N-W corner

Finally we brought the setup in EEroom, and positioned the coil at SIB1, W-S corner (ready for the next shift)

The log file with all the details of gps and actions is attached.

Non-image files attached to this report

20240121_NF_magnetic_injections.txt

Comments to this report:

Fiori, Tringali, Quéméner - 21:58 Monday 22 January 2024 (63057)

Below is a list of some peak frequencies (Hz) which were excited during the close field magnetic injection on SDB1. The peaks marked with a cross X are also present w/o excitation. A plot showing Hrec during injection (red curve) along with a reference curve w/o injection (violet curve) is attached.

28.7
30.5
122.7
133.2
155.2
157.7 X
162.7 X
165.2 X
171.3 X
177.4
194.1
196.9 X
201.6 X
210.0
216.8
219.1
232.2
279.0 X
410.8
482.2 X? Bump

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